Vuex中actions的使用教程详解

this.$store.dispatch('actions方法名', 具体值)        // 不分模块
this.$store.dispatch('模块名/actions方法名', 具体值) // 分模块

import { mapActions } from 'vuex'
export default {
    computed: {
        // 不分模块
        ...mapActions(['actions方法名'])          
 
        // 分模块，不改方法名
        ...mapActions('模块名', ['actions方法名'])
        
        // 分模块，不改方法名
        ...mapActions('模块名',{'新actions方法名': '旧actions方法名'})
    }
}

import Vue from 'vue';
import Vuex from 'vuex';
 
Vue.use(Vuex);
const counterStore = new Vuex.Store(
    {
        state: {
            count: 10
        },
 
        getters: {
            doubleCount(state) {
                return state.count * 2;
            }
        },
 
        mutations: {
            increment(state) {
                state.count++;
            },
            decrement(state) {
                state.count--;
            },
            // 带参数
            addNumber(state, param1) {
                state.count += param1;
            },
        },
 
        actions: {
            asyncIncrement(context) {
                console.log('CounterStore=> action: asyncIncrement');
                setTimeout(() => {context.commit('increment')}, 1000)
            },
 
            asyncAddNumber(context, n) {
                console.log('CounterStore=> action: asyncAddNumber');
                setTimeout(() => {context.commit('addNumber', n)}, 1000)
            }
        }
    }
);
 
export default counterStore;

<template>
  <div class="outer">
    <h3>父组件</h3>
    <component-a></component-a>
    <component-b></component-b>
  </div>
</template>
 
<script>
import ComponentA from "./ComponentA";
import ComponentB from "./ComponentB";
 
export default {
  name: 'Parent',
  components: {ComponentA, ComponentB},
}
</script>
 
<style scoped>
.outer {
  margin: 20px;
  border: 2px solid red;
  padding: 20px;
}
</style>

<template>
  <div class="container">
    <h3>ComponentA</h3>
    <button @click="thisAsyncIncrement">异步加1</button>
    <button @click="thisAsyncAddNumber">异步增加指定的数</button>
  </div>
</template>
 
<script>
export default {
  data() {
    return {
      cnt: 5
    }
  },
  methods:{
    thisAsyncIncrement() {
      this.$store.dispatch('asyncIncrement')
    },
    thisAsyncAddNumber() {
      this.$store.dispatch('asyncAddNumber', this.cnt)
    }
  }
}
</script>
 
<style scoped>
.container {
  margin: 20px;
  border: 2px solid blue;
  padding: 20px;
}
</style>

<template>
  <div class="container">
    <h3>ComponentB</h3>
    <div>计数器的值：{{thisCount}}</div>
    <div>计数器的2倍：{{thisDoubleCount}}</div>
  </div>
</template>
 
<script>
export default {
  computed:{
    thisCount() {
      return this.$store.state.count;
    },
    thisDoubleCount() {
      return this.$store.getters.doubleCount;
    },
  }
}
</script>
 
<style scoped>
.container {
  margin: 20px;
  border: 2px solid blue;
  padding: 20px;
}
</style>

import Vue from 'vue'
import Router from 'vue-router'
import Parent from "../components/Parent";
 
Vue.use(Router)
 
export default new Router({
  routes: [
    {
      path: '/parent',
      name: 'Parent',
      component: Parent,
    }
  ],
})